Mac to PC JPEG

I’m doing a website for a client at the moment which involved an awful lot of photography. I often work between a mac and a pc. Don’t get me wrong I’m a mac boy through and through but I haven’t been able to save enough of my pennies for one at home yet.
The client in question has a mac and was sending over jpegs. I started the design on a mac and there were no problems. I then went to do some coding at home one evening and had to edit some of the images and most of them wouldn’t open….weird.
So I did a google search. I found a few people who had the same problem. There were various suggestions on what had caused the problem but not really any ways of fixing it at the pc end without going back to the mac and resaving them, which wasn’t really an option as I couldn’t ask the client to save off 50+ images again, and I knew I could open them on a mac if I had to.
After trying various things, I managed to get them to open by saving them from my emails as a different file name with a .jpeg extension instead of .jpg
Interestingly, it didn’t work just changing the name and extension once I had saved it out of my emails.
Thought I would share as I spent a good hour trying to sort it :]
Will make a long overdue update to the portfolio soon!